Poison applicator



April 29 J. P. M LAURIN POISON APPLICAT R 3 2 9 l 4 2 y\ a M 8 WITNESSESATTORNEYS Fatented Apr. 29, rear.

JEWELL r. nr nnuarn, or DILLON, scorn CAROLINA.

POISON APPLICATO'R.

Application filed May 24, 1923. Serial No. 641,179.

arsenate is the most efficient if not the only effective poison adaptedto be utilized for checkingand killing the boll weevil. In the solutionsof the arsenate which are employed the calcium arsenate is onlyimperfectly dissolved and considerable difliculty has been experiencedby reason of the fact that the 7 solid particles of the calcium arsenatecontained in the solution will build up and form around'the valvesutilized to control the flow of the poison in poison applicatorsheretofore proposed.

One of the principal objects of the present invention is to provide apoison applicator wherein the feed of the calcium arsenate may becompletely controlled and may be so regulated as to be uniform orvariable as desired and wherein at the same time the difficultyheretofore encountered in respect of the solid particles of the calciumarsenate building up around the valve or other means controlling thefeed is entirely overcome.

A further object is to provide a poison applicator of this character andhaving these advantages and which has also all of the advantages andcapacities of the applicators forming the subject-matter ofmy co-pendingapplications herein above referred to and which is at the same time ofsimple and durable construction, reliable in operation, easilycontrolled and regulated, well balanced and adapted to be manufacturedat a slight expense from materials and facilities ordinarily available.

Other objects and advantages of themvention reside in certain novelfeatures of the construction, combination and arrangement of partswhichwill be hereinafter more 7 fully described and particularly. pointed outI in the appended claims, reference being had to the accompanyingdrawings forming part of this specification and in which:

Figure 1 is a perspective view, illustrating the preferred. embodimentof the invention;

Figure 2 is a view in section on line 2-2 ofFigure1;'

Figure 3 is a fragmentary perspective view, showing the valve and theoperating means therefor; and

Figure 4'. is a fragmentary detail view in section, showing thestructure of the distributing pipe adj acent'the valve therein.

Referring to the drawings wherein for the sake of illustration is shownthe preferred embodiment of the invention, the numeral 10 designatesgenerally a portable container or reservoir for the solution of calciumarsenate or poison employed. This container may be of the constructionshown in either of my oopending applications herein above referred to ormaybe of any'conventional or suitable construction "and for the sake ofillustration is shown as including a cylindrical body portion 11 havinga closed bottom 12 and having at its upper end or at the end oppositeits bottom a head or top 13 of frusto-conical form.

It is to be understood that the container 10 is portable and is to becarried around by the person applying the poison and for this purposeany suitable means may be employed for facilitating the support of thecontainer. For instance the means shown in'my co-pending applicationherein above referred to may be employed. For the sake of illustrationahandle, designated at 15, is

shown as secured to the body portion 11 of threads of the nipple 19 toprovide the detachable connection. If desired the packing 22 may beemployed between the sections 17 and the pipe 16 but it is to bunderstood that this packing may be omitted if deemed expedient.

Means is provided for controlling and regulating the feed of the poisonthrough the delivery and distributing pipe 16 and preferably this meansincludes a valve 25 of conical form and coacting with a correspondinglyformed valve seat 26 1nachined or otherwise suitably formed on theshoulder 20. The valve 25 is pivotally mounted, as at 27, on theshoulder. and carries a short stem 28. The valve may be adjusted andcontrolled so as to permit a continuous uniform flow of the desiredquantity of the calcium arsenate or poison and it may be adjusted topermit of a drop by drop flow as desired. and the mechanism foraccomplishing this regulation or control of the valve will now bedescribed.

As clearly shown in Figure 3 a rotatable .controlled shaft 30 isprovided which extends transversely through the top of the container 10,the shaft 30 being mounted in bearing sleeves 31 and 32 secured bywelding, soldering or the'like' to the top or frustoconical head 13. Oneend of the control shaft 30 projects beyond the sleeve 32 and to thisprojecting portion or end a control plate or finger piece 33 is pinned,as at 34,

or otherwise fixed. The portion of the shaft 30 which lies intermediatethe bearing sleeves 31 and 32 has mounted thereon and secured thereto asleeve 35 which rotates with the shaft 30 and which has integrallyformed therewith or rigidly secured thereto a crank arm 36. A retractilecoil spring 37 has one end secured to the outer end of the crank arm 36and has its opposite end secured to the top 13 and tends to rotate thecrank arm 36 and the shaft 30 in one direction so as to tend to closethe valve 25 as will presently appear. An apertured lug 38 is integrallyformed with or suitably secured to the portion of the crank arm 36 whichlies between its outer end and the bearing sleeve 35 and to thisapertured lug an eye 39 formed on one end of a connect- 'ing rod 40 issecured, the other end of the connecting rod 40 having a similar eye 41formed thereon and pivotally engaged or interconnected with an eye 42formed on the outer end of the short stem 28 of the valve 45.

Releasable and adjustable means is provided for holding or setting thevalve 25 in adjusted position against the action of the spring 37 andpreferably this means comprises a post 45 carried by the handle 15 or.by any convenient support provided on the container 10 and having itsouter end threaded as-at 46 and loosely fitted through an elongatedopening 47 provided in the control plate or finger piece 33. A knurlednut 48 is threadedly engaged with the post 46 and abuts the plate orfinger piece 33.

In operation thevalve 25'is controlled from the finger piece or controlplate 33'. Thus when the finger piece 33 is rotated in a clockwisedirection, as viewed in-Fig ures 1 and 3 the shaft 30 and its crank ofthis arm 36 are'similarly rotated and'the motion of the crank arm 36through the rod 40 tends to swing the valve 25 about its pivot and toopen the same. When the valve 25 has been opened to the desired degreethe nut 48 is threaded up on the post 45 until it engages the controlplate 33 and is effective to hold the control plate 33 in such positionas to maintain the valve 25 open to the desired degree. In this mannerthe valve 25 may be held in such position to provide for drop by dropfeed or for a con:

tinuous uniform flow of the desired quantity of poison. Again this flowmay be varied for it is to be noted that the nut 48 i and the post 45 donot prevent the control plate or finger piece 33 from being manipulatedto further open the valve so that the quantity ordegree of flow may beenlarged at any time as desired. This freedom of the control plate orfinger piece 33 has another very important advantage in that it permitsof and provides for vibration of the valve 25 to break down deposits ofcalcium arsenate liable to build up between the valve 25 and its seat 26for by intermittently pressing and releasing the control plate 33, thecontrol plate and spring 36 effect a rapid and continuous oscillation orvibration of the valve 25 whereby the deposits of solid particles of thecalcium arsenate between the valve 25 and its seat 26 will be brokendown.

I claim: 3

In a poison applicator, a container, a distributing pipe connected withthe container and having a detachable section adjacent its outer end, avalve arranged in said distributing pipe adjacent said detachable.connection controlling the feed of said poison through said pipe, meansfor controlling said valve and vibrating the same when desired includinga control shaft mounted on the container and connected with the valve, aspring connected with the control shaft and tending ts turn the same tosuch position as to close the valve, a finger piece con nected with thecontrol shaft and adapted to be manipulated to open the valve, saidfinger piece having an opening, a post carried by 5 the container andextending through the opening, said post being threaded and a nutengaged with the post and with the finger piece for holding the fingerpiece in such position as to maintain the valve open to the desireddegree While permitting the finger piece to be manually operated toincrease the degree to which the valveis open or to vibrate the same.

JEWELL P. MCLAURIN.

